Let-off for narrow-ware looms



S. WAITE.

LET-OFF FOR NARROW WARE LOOMS.

No Model.)

No. 562,989. Patented June 30, 1896.

QW/Dwmeo B GRAHAM. PKUTU-UTMOYWASIIINGNNYD C.

UNITED STATES PATENT OFFICE.

SAMUEL WAITE, OF LOWELL, MASSACHUSETTS.

LET-OFF FOR NARROW-WARE LOOMS. V

SPECIFICATION forming part of Letters Patent No. 562,989, dated June 30,1896.

Application filed October 3, 1895.

To all whom it may concern.-

Be it known that I, SAMUEL WAITE, a citizen of the United States,residing at Lowell, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inLet-Offs for NarrowlVare Looms, of which the following is aspecification.

My invention relates to the let-off mechanism of narrow-ware looms.Heretofore in narrow-ware looms there has been aseparate warp-beam foreach set of warps that are used in making one of the narrow-warefabrics, as suspender goods, lamp-wicks, 850., and a separate weightedpulleyblock,carryinga pulley around which the warps pass, said weightedpulley block or frame acting to apply the proper tension to the warp asit is drawn into the loom. In this construction the tension on each setof warps is independent of the tension on any other set, and the tensionis liable to vary in the operation of the loom, so that the finishedfabrics will vary, and will not be of uniform tension. Some will stretchmore than others.

It is very desirable in manufacturing narrow-ware goods that all thegoods manufactured on one loom should be made uniformly, and the sametension applied to all the sets of warps simultaneously, so that thefinished product Will all correspond, and one fabric will not stretch orgive more than another, and will not be woven closer or more open thananother, (to.

The object of my invention is to obtain the desired result mentionedabove, and this I do by using one warp-beam for a number of sets ofwarps, as twelve, instead of an individual warp-beam for each set.Ordinarily I use two warp-beams in an ordinary narrowware loom, and byusing a supplemental attachment or device, combined with all theweighted pulley blocks or frames used "for the sets of warps on onebeam, there being one weighted pulley-block and pulley for each set ofwarps, said attachment consisting of a heavy metal bar or rod, which Iterm an evener-bar, and which rests and is supported directly on top ofthe weighted pulleyblocks, and extends between the warps in the SerialNo. 564,496. (No model.)

- direction of the width of the loom, and is of a length correspondingto the length of the wound thereon.

The weight of the evener-bar, which is considerable, ordinarily aboutfifty pounds, increases the tension on the warps over what is ordinarilygiven to them by the weighted pulley-blocks, so that Iobtain thisadditional tension, which I have found very desirable in makingnarrow-ware goods, as the finished goods are substantiallynon-stretchable.

By means of the evener-bar, which rests on all the pulley-blocks, asabove stated, an almost uniform tension is maintained on all the warps,for in case the tension on one set of warps in weaving the goods tendsto raise the weighted pulley-block, the evener-bar prevents it fromraising, as the weight thereof is sufficient to overcome the extratension. In case several of the pulley-blocks are raised simultaneouslyby increased tension on several sets of warps, the tension beingsufficient to raise the evener-bar, I provide a connection from said barto the friction letoflt' of the warp-beam, to release the friction andallow the beam to let off faster, until the evener-bar returns to itsnormal position, resting on all the pulley-blocks.

My invention consists in certain novel features of construction of myimprovements, as will be hereinafter fully described, and the naturethereof indicated by the claims.

Referring to the drawings, Figure 1 is a rear view of a portion of awarp-beam and let-off attachment of a narrow-ware loom, sufficient toillustrate myimprovements applied thereto, looking in the direction ofarrow a, Fig. 2; and Fig. 2 is an end view looking in the direction ofarrow 1), Fig. 1.

In the accompanying drawings, 1 is a portion of a warp-beam, mounted toturn, in this instance, in stands 2, (only one stand is shown,) locatedat the rear of the loom. (Not shown.) The beam 1 is provided with a head1, around which a friction-band 3 passes in the usual way. The band 3 isattached at one end to the stand 2 and at its other end to a lever 4,pivoted at one end, in this instance on the stand 2, and provided withan adjustable weight 5 at its other end in the usual way. The top castle6 is providedwith a series of eyes 7, through each one of which one setof warp-threads, as 8, pass, and a series of pulleys 9, mounted inbrackets 10.

Each set of warp-threads, as 8, pass from the beam 1, through aneye 7,and around a pulley 11, mounted in a pulleyblock or frame 12, then overpulleys 9, mounted in blocks 10, to the rolls 13, (shown in Fig. 2,) andto the loom (not shown) in the usual way.

Each pulley-block 12 is provided with a hook 12, on which is hung a rod14, carrying weights 15, of the desired size, to produce the desiredtension on the warp-threads.

Combined with the pulley-blocks 12 is a metal bar or rod 16, of thedesired weight. Said bar 16 rests on the top of the blocks 12, and isheld in position, preferably, by ridges or projections 12" on eachblock.

The bar 16,which Iterm the evener-bar, extends between the sets ofwarp-threads in the direction of the width of the loom, and bears evenlyon all the pulley-blocks, when they are in their proper position, andincreases, the tension on all the warp-threads, over the tensionproduced by the weights 15, by the weight of said bar 16. The weight ofsaid bar is sufficient to prevent any one of the pulley-blocks 12raising said bar out of a horizontal plane, in case the tension on anyone set of warp-threads is sufficient to overcome the weight of theweights 15, but in case of an increased tension on all or several of thesets of warp-threads the bar 16 may be raised with the weightedpulley-blocks 12, and when. raised to a predetermined point will,through cord 17, attached at one end to said bar and at its other end tothe free end of the lever l, raise said lever and release thefriction-band 3 to allow the warp-beam to let off more warp. The lettingofi of additional warp allows the bar 16 and weighted pulley-blocks 12to drop down to their normal position.

In case the tension on any one set of warpthreads is lessen ed for anyreason, the weighted pulley-block 12 may temporarily drop down below theevener-bar 16, as shown in the drawings, but the tension will ordinarilykeep each pulley-block 12 in engagement with said evener-bar.

By using 'one warp-beam for a number of set of warps, and by using theevener-bar 16, as. above described, I obtain a very uniform tension 011all the sets of warps, and produce fabrics which are very uniformly madeand are substantially non-stretchable.

The advantages of my improvements will be readily appreciated by thoseskilled in the art.

The details of construction of my improvements may be varied if desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a narrow-ware loom having a warpbeam mounted in stands, afriction-band engaging said beam, a weighted lever pivoted at one end tosaid stand and having secured thereto one end of said friction-band, atop castle havinga series of eyes and one of blocks with pulleys mountedtherein, through which 1 eyes and about which pulleys the warps pass,

and depending pulley-blocks with pulleys se cured therein engaging saidwarps between said eyes and pulleys, said blocks having ridges on theouter edges of their upper faces, an evener-bar adapted to engage saiddepending blocks between said ridges and connected with said lever, anda hooked arm on the lower side of each of the said depending blocks. andpulleys with adjustable weights thereon, said parts being combinedsubstantially as described.

2. In a narrow-ware loom having a warpbeam with weighted lever securedthereto and engaging a friction-band thereon, a top castle having eyesand pulleys secured thereon, pulleys depending from warpspassing'through said eyes, adjustable weights secured to said pulleys,an evener-bar adapted to rest on the upper face of said dependingpulleys, and connected with said lever, said parts being combinedsubstantially as described. 7

3. In a narrow-ware loom, a warp-beam having a friction-band, and aweighted lever, a top castle provided with a series of eyes throughwhich the warp-threads pass, the two sets of blocks 10 and 12 with thepulleys 9 and 11 mounted respectively thereon, and around which pulleysthe warp-threads pass, the rod 14 having weights thereon and supportedby the block 12 and the block 16 resting on said blocks 12 and connectedwith said weighted lever, said parts being combin ed substantially asdescribed.

SAMUEL WAITE. \Vitnesses:

JOHN C. DEWEY, M. J. GALVIN.

